Ion
No. of lines
Lines with
transition
probabilities
Lines with
level
designations
Nb I
509
0
0
Nb II
150
0
0
Nb III
108
0
0
Nb IV
819
819
819
Nb V
12
0
0
Nb XXXIX
26
0
26
Nb XLI
13
12
13
Total:
1637
831
858
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